[jdom-interest] performance on tonights CVS

Jason Hunter jhunter at acm.org
Sat Mar 16 15:13:47 PST 2002

philip.nelson at omniresources.com wrote:
> > My best brainstorm is to move JDOMFactory and
> > DefaultJDOMFactory into org.jdom.  It's arguably appropriate,
> > since they can build document components anytime, not only
> > during the input phase.  We add a NonVerifyingJDOMFactory
> > which uses package-protected constructors to build objects
> > without verification.  Parsers use that factory by default.
> > It builds the same classes as always, but skips the Verifier
> > calls.  Other people who know what they're doing can use the
> > factory also, but they'll be the experts knowing what they're doing.
> I sort of like this idea.  The object will still verify when the contents
> are changed so it acts like we say it is supposed to act.  If my performance
> is suffering when I am doing a lot of editing of content, I can subclass to
> skip it, though that is unfortunate because it my most common case rather
> than the other way around.  So, it seems like a partial solution.  In our
> earlier testing character validation was good for 10-20% of the time.

You don't need to subclass really, just build elts using the factory
instead of "new".  This factory plan requires we always do
tree-structure checking but when I timed that earlier it was really
quite fast.


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